[766] | 1 | /* |
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| 2 | Copyright (c) 2002, 2010, Oracle and/or its affiliates. All rights reserved. |
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| 3 | |
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| 4 | |
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| 5 | The MySQL Connector/J is licensed under the terms of the GPLv2 |
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| 6 | <http://www.gnu.org/licenses/old-licenses/gpl-2.0.html>, like most MySQL Connectors. |
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| 7 | There are special exceptions to the terms and conditions of the GPLv2 as it is applied to |
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| 8 | this software, see the FLOSS License Exception |
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| 9 | <http://www.mysql.com/about/legal/licensing/foss-exception.html>. |
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| 10 | |
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| 11 | This program is free software; you can redistribute it and/or modify it under the terms |
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| 12 | of the GNU General Public License as published by the Free Software Foundation; version 2 |
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| 13 | of the License. |
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| 14 | |
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| 15 | This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; |
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| 16 | without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. |
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| 17 | See the GNU General Public License for more details. |
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| 18 | |
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| 19 | You should have received a copy of the GNU General Public License along with this |
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| 20 | program; if not, write to the Free Software Foundation, Inc., 51 Franklin St, Fifth |
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| 21 | Floor, Boston, MA 02110-1301 USA |
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| 22 | |
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| 23 | |
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| 24 | |
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| 25 | */ |
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| 26 | package com.mysql.jdbc.jdbc2.optional; |
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| 27 | |
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| 28 | import java.lang.reflect.InvocationHandler; |
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| 29 | import java.lang.reflect.InvocationTargetException; |
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| 30 | import java.lang.reflect.Method; |
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| 31 | import java.lang.reflect.Proxy; |
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| 32 | import java.sql.Array; |
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| 33 | import java.sql.Blob; |
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| 34 | import java.sql.Clob; |
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| 35 | import java.sql.Connection; |
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| 36 | import java.sql.NClob; |
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| 37 | import java.sql.SQLClientInfoException; |
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| 38 | import java.sql.SQLException; |
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| 39 | import java.sql.SQLXML; |
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| 40 | import java.sql.Savepoint; |
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| 41 | import java.sql.Statement; |
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| 42 | import java.sql.Struct; |
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| 43 | import java.util.ArrayList; |
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| 44 | import java.util.HashMap; |
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| 45 | import java.util.List; |
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| 46 | import java.util.Map; |
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| 47 | import java.util.Properties; |
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| 48 | |
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| 49 | import com.mysql.jdbc.ConnectionImpl; |
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| 50 | import com.mysql.jdbc.SQLError; |
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| 51 | |
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| 52 | /** |
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| 53 | */ |
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| 54 | public class JDBC4ConnectionWrapper extends ConnectionWrapper { |
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| 55 | |
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| 56 | /** |
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| 57 | * Construct a new LogicalHandle and set instance variables |
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| 58 | * |
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| 59 | * @param mysqlPooledConnection |
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| 60 | * reference to object that instantiated this object |
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| 61 | * @param mysqlConnection |
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| 62 | * physical connection to db |
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| 63 | * |
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| 64 | * @throws SQLException |
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| 65 | * if an error occurs. |
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| 66 | */ |
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| 67 | public JDBC4ConnectionWrapper(MysqlPooledConnection mysqlPooledConnection, |
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| 68 | com.mysql.jdbc.Connection mysqlConnection, boolean forXa) |
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| 69 | throws SQLException { |
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| 70 | super(mysqlPooledConnection, mysqlConnection, forXa); |
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| 71 | } |
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| 72 | |
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| 73 | public void close() throws SQLException { |
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| 74 | try { |
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| 75 | super.close(); |
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| 76 | } finally { |
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| 77 | this.unwrappedInterfaces = null; |
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| 78 | } |
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| 79 | } |
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| 80 | |
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| 81 | public SQLXML createSQLXML() throws SQLException { |
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| 82 | checkClosed(); |
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| 83 | |
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| 84 | try { |
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| 85 | return ((java.sql.Connection) this.mc).createSQLXML(); |
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| 86 | } catch (SQLException sqlException) { |
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| 87 | checkAndFireConnectionError(sqlException); |
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| 88 | } |
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| 89 | |
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| 90 | return null; // never reached, but compiler can't tell |
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| 91 | } |
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| 92 | |
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| 93 | public java.sql.Array createArrayOf(String typeName, Object[] elements) |
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| 94 | throws SQLException { |
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| 95 | checkClosed(); |
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| 96 | |
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| 97 | try { |
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| 98 | return ((java.sql.Connection) this.mc).createArrayOf(typeName, |
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| 99 | elements); |
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| 100 | } catch (SQLException sqlException) { |
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| 101 | checkAndFireConnectionError(sqlException); |
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| 102 | } |
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| 103 | |
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| 104 | return null; // never reached, but compiler can't tell |
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| 105 | } |
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| 106 | |
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| 107 | public Struct createStruct(String typeName, Object[] attributes) |
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| 108 | throws SQLException { |
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| 109 | checkClosed(); |
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| 110 | |
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| 111 | try { |
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| 112 | return ((java.sql.Connection) this.mc).createStruct(typeName, |
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| 113 | attributes); |
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| 114 | } catch (SQLException sqlException) { |
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| 115 | checkAndFireConnectionError(sqlException); |
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| 116 | } |
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| 117 | |
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| 118 | return null; // never reached, but compiler can't tell |
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| 119 | } |
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| 120 | |
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| 121 | public Properties getClientInfo() throws SQLException { |
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| 122 | checkClosed(); |
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| 123 | |
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| 124 | try { |
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| 125 | return ((java.sql.Connection) this.mc).getClientInfo(); |
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| 126 | } catch (SQLException sqlException) { |
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| 127 | checkAndFireConnectionError(sqlException); |
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| 128 | } |
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| 129 | |
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| 130 | return null; // never reached, but compiler can't tell |
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| 131 | } |
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| 132 | |
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| 133 | public String getClientInfo(String name) throws SQLException { |
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| 134 | checkClosed(); |
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| 135 | |
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| 136 | try { |
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| 137 | return ((java.sql.Connection) this.mc).getClientInfo(name); |
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| 138 | } catch (SQLException sqlException) { |
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| 139 | checkAndFireConnectionError(sqlException); |
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| 140 | } |
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| 141 | |
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| 142 | return null; // never reached, but compiler can't tell |
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| 143 | } |
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| 144 | |
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| 145 | /** |
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| 146 | * Returns true if the connection has not been closed and is still valid. |
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| 147 | * The driver shall submit a query on the connection or use some other |
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| 148 | * mechanism that positively verifies the connection is still valid when |
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| 149 | * this method is called. |
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| 150 | * <p> |
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| 151 | * The query submitted by the driver to validate the connection shall be |
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| 152 | * executed in the context of the current transaction. |
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| 153 | * |
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| 154 | * @param timeout - |
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| 155 | * The time in seconds to wait for the database operation used to |
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| 156 | * validate the connection to complete. If the timeout period |
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| 157 | * expires before the operation completes, this method returns |
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| 158 | * false. A value of 0 indicates a timeout is not applied to the |
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| 159 | * database operation. |
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| 160 | * <p> |
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| 161 | * @return true if the connection is valid, false otherwise |
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| 162 | * @exception SQLException |
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| 163 | * if the value supplied for <code>timeout</code> is less |
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| 164 | * then 0 |
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| 165 | * @since 1.6 |
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| 166 | */ |
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| 167 | public synchronized boolean isValid(int timeout) throws SQLException { |
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| 168 | try { |
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| 169 | return ((java.sql.Connection) this.mc).isValid(timeout); |
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| 170 | } catch (SQLException sqlException) { |
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| 171 | checkAndFireConnectionError(sqlException); |
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| 172 | } |
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| 173 | |
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| 174 | return false; // never reached, but compiler can't tell |
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| 175 | } |
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| 176 | |
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| 177 | public void setClientInfo(Properties properties) |
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| 178 | throws SQLClientInfoException { |
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| 179 | try { |
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| 180 | checkClosed(); |
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| 181 | |
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| 182 | ((java.sql.Connection) this.mc).setClientInfo(properties); |
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| 183 | } catch (SQLException sqlException) { |
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| 184 | try { |
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| 185 | checkAndFireConnectionError(sqlException); |
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| 186 | } catch (SQLException sqlEx2) { |
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| 187 | SQLClientInfoException clientEx = new SQLClientInfoException(); |
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| 188 | clientEx.initCause(sqlEx2); |
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| 189 | |
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| 190 | throw clientEx; |
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| 191 | } |
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| 192 | } |
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| 193 | } |
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| 194 | |
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| 195 | public void setClientInfo(String name, String value) |
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| 196 | throws SQLClientInfoException { |
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| 197 | try { |
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| 198 | checkClosed(); |
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| 199 | |
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| 200 | ((java.sql.Connection) this.mc).setClientInfo(name, value); |
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| 201 | } catch (SQLException sqlException) { |
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| 202 | try { |
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| 203 | checkAndFireConnectionError(sqlException); |
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| 204 | } catch (SQLException sqlEx2) { |
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| 205 | SQLClientInfoException clientEx = new SQLClientInfoException(); |
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| 206 | clientEx.initCause(sqlEx2); |
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| 207 | |
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| 208 | throw clientEx; |
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| 209 | } |
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| 210 | } |
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| 211 | } |
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| 212 | |
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| 213 | /** |
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| 214 | * Returns true if this either implements the interface argument or is |
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| 215 | * directly or indirectly a wrapper for an object that does. Returns false |
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| 216 | * otherwise. If this implements the interface then return true, else if |
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| 217 | * this is a wrapper then return the result of recursively calling |
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| 218 | * <code>isWrapperFor</code> on the wrapped object. If this does not |
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| 219 | * implement the interface and is not a wrapper, return false. This method |
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| 220 | * should be implemented as a low-cost operation compared to |
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| 221 | * <code>unwrap</code> so that callers can use this method to avoid |
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| 222 | * expensive <code>unwrap</code> calls that may fail. If this method |
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| 223 | * returns true then calling <code>unwrap</code> with the same argument |
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| 224 | * should succeed. |
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| 225 | * |
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| 226 | * @param interfaces |
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| 227 | * a Class defining an interface. |
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| 228 | * @return true if this implements the interface or directly or indirectly |
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| 229 | * wraps an object that does. |
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| 230 | * @throws java.sql.SQLException |
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| 231 | * if an error occurs while determining whether this is a |
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| 232 | * wrapper for an object with the given interface. |
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| 233 | * @since 1.6 |
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| 234 | */ |
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| 235 | public boolean isWrapperFor(Class<?> iface) throws SQLException { |
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| 236 | checkClosed(); |
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| 237 | |
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| 238 | boolean isInstance = iface.isInstance(this); |
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| 239 | |
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| 240 | if (isInstance) { |
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| 241 | return true; |
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| 242 | } |
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| 243 | |
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| 244 | return (iface.getName().equals("com.mysql.jdbc.Connection") || |
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| 245 | iface.getName().equals("com.mysql.jdbc.ConnectionProperties")); |
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| 246 | } |
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| 247 | |
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| 248 | /** |
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| 249 | * Returns an object that implements the given interface to allow access to |
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| 250 | * non-standard methods, or standard methods not exposed by the proxy. The |
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| 251 | * result may be either the object found to implement the interface or a |
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| 252 | * proxy for that object. If the receiver implements the interface then that |
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| 253 | * is the object. If the receiver is a wrapper and the wrapped object |
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| 254 | * implements the interface then that is the object. Otherwise the object is |
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| 255 | * the result of calling <code>unwrap</code> recursively on the wrapped |
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| 256 | * object. If the receiver is not a wrapper and does not implement the |
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| 257 | * interface, then an <code>SQLException</code> is thrown. |
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| 258 | * |
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| 259 | * @param iface |
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| 260 | * A Class defining an interface that the result must implement. |
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| 261 | * @return an object that implements the interface. May be a proxy for the |
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| 262 | * actual implementing object. |
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| 263 | * @throws java.sql.SQLException |
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| 264 | * If no object found that implements the interface |
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| 265 | * @since 1.6 |
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| 266 | */ |
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| 267 | public synchronized <T> T unwrap(java.lang.Class<T> iface) |
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| 268 | throws java.sql.SQLException { |
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| 269 | try { |
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| 270 | if ("java.sql.Connection".equals(iface.getName()) |
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| 271 | || "java.sql.Wrapper.class".equals(iface.getName())) { |
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| 272 | return iface.cast(this); |
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| 273 | } |
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| 274 | |
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| 275 | if (unwrappedInterfaces == null) { |
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| 276 | unwrappedInterfaces = new HashMap(); |
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| 277 | } |
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| 278 | |
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| 279 | Object cachedUnwrapped = unwrappedInterfaces.get(iface); |
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| 280 | |
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| 281 | if (cachedUnwrapped == null) { |
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| 282 | cachedUnwrapped = Proxy.newProxyInstance(this.mc.getClass() |
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| 283 | .getClassLoader(), new Class[] { iface }, |
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| 284 | new ConnectionErrorFiringInvocationHandler(this.mc)); |
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| 285 | unwrappedInterfaces.put(iface, cachedUnwrapped); |
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| 286 | } |
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| 287 | |
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| 288 | return iface.cast(cachedUnwrapped); |
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| 289 | } catch (ClassCastException cce) { |
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| 290 | throw SQLError.createSQLException("Unable to unwrap to " |
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| 291 | + iface.toString(), SQLError.SQL_STATE_ILLEGAL_ARGUMENT, this.exceptionInterceptor); |
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| 292 | } |
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| 293 | } |
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| 294 | |
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| 295 | /** |
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| 296 | * @see java.sql.Connection#createBlob() |
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| 297 | */ |
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| 298 | public Blob createBlob() throws SQLException { |
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| 299 | checkClosed(); |
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| 300 | |
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| 301 | try { |
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| 302 | return ((java.sql.Connection) this.mc).createBlob(); |
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| 303 | } catch (SQLException sqlException) { |
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| 304 | checkAndFireConnectionError(sqlException); |
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| 305 | } |
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| 306 | |
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| 307 | return null; // never reached, but compiler can't tell |
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| 308 | } |
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| 309 | |
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| 310 | /** |
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| 311 | * @see java.sql.Connection#createClob() |
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| 312 | */ |
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| 313 | public Clob createClob() throws SQLException { |
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| 314 | checkClosed(); |
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| 315 | |
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| 316 | try { |
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| 317 | return ((java.sql.Connection) this.mc).createClob(); |
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| 318 | } catch (SQLException sqlException) { |
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| 319 | checkAndFireConnectionError(sqlException); |
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| 320 | } |
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| 321 | |
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| 322 | return null; // never reached, but compiler can't tell |
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| 323 | } |
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| 324 | |
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| 325 | /** |
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| 326 | * @see java.sql.Connection#createNClob() |
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| 327 | */ |
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| 328 | public NClob createNClob() throws SQLException { |
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| 329 | checkClosed(); |
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| 330 | |
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| 331 | try { |
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| 332 | return ((java.sql.Connection) this.mc).createNClob(); |
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| 333 | } catch (SQLException sqlException) { |
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| 334 | checkAndFireConnectionError(sqlException); |
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| 335 | } |
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| 336 | |
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| 337 | return null; // never reached, but compiler can't tell |
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| 338 | } |
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| 339 | } |
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